I mean, this is what the GPL and (to a lesser extent) the LGPL encourage. For-profit companies will look on the viral nature of those licenses in horror, and try to distance themselves from anything that uses them.

Nano is GPL, Pico is Apache-2.0. Apple are going to choose pico given how similar the editors are, there's no real downside to going with Pico.

As a vi-guy, who's even edited files used cat, tail, head and ed in extremis on a DECstation when Ultrix crashed and wouldn't boot, I admit that I don't really care either way :)